Preheating of objects in our fiducial ﹩F=1﹩, ﹩\epsilon _{k}=0.05﹩ model. Here each panel gives the contribution to ﹩\langle N_{S}( z_{f},\ M_{f}) \rangle ﹩ from sources with redshifts ≥z_source. Panels are labeled by their ﹩z_{f}﹩‐values, and in all panels the curves represent masses (top to bottom) of 10¹⁵, 10¹⁴, 10¹³, 10¹², 10¹¹, and 10¹⁰ M_⊙.